Division of Rheumatology AOUC, Denothe Centre, Department of Biomedicine, University of Florence, Florence, Italy.
Clin Rheumatol. 2012 Apr;31(4):727-31. doi: 10.1007/s10067-011-1909-9. Epub 2011 Dec 27.
This study was conducted to assess ultrasound (US) and clinical changes of Baker's cyst (BC) of patients with knee osteoarthritis (OA) after steroid injection. Patients with knee OA complicated with symptomatic BC (40) were treated with US-guided direct (posterior) aspiration. The injection of 40 mg triamcynolone acetonide was in 20 patients direct into the BC and in other 20 subjects intra-articular (anterior). BC diameters (longitudinal, transverse, and thickness) were measured and followed up with US at baseline, 2, 4, and 8 weeks after injection. Swelling, pain, and range motion were scored at clinical examination with Rauschning and Lindgren classification (RLC, since 0 normal to 3 maximal signs). All US measures of BC and RLC significantly decreased after treatment, in comparison to baseline (p < 0.001) and during the follow-up, did not change through the time (no significant difference between 2, 4, and 8 weeks). At 4 and 8 weeks, diameters measured at US are lower when BC is directly infiltrated in comparison to intra-articular injection (p < 0.01). US steroid direct injection reduces US measures and clinics of BC in knee OA, in particular, when steroid is directly infiltrated into BC.
本研究旨在评估膝骨关节炎（OA）患者接受类固醇注射后超声（US）和贝克囊肿（BC）的临床变化。40 例膝 OA 合并有症状性 BC 的患者接受了 US 引导下直接（后）抽吸治疗。在 20 例患者中，将 40mg 曲安奈德直接注入 BC，在另外 20 例患者中，将其注入关节腔（前）。在基线、注射后 2、4 和 8 周时，测量 BC 的直径（纵向、横向和厚度）并进行 US 随访。在临床检查中，根据 Rauschning 和 Lindgren 分类（RLC，从 0 正常到 3 最大体征）对肿胀、疼痛和关节活动范围进行评分。与基线相比（p < 0.001），所有 BC 的 US 测量值和 RLC 在治疗后均显著降低，并且在随访期间没有随时间变化（2、4 和 8 周之间无显著差异）。在 4 周和 8 周时，与关节内注射相比，直接注入 BC 时 US 测量的直径更低（p < 0.01）。US 类固醇直接注射可降低膝 OA 中 BC 的 US 测量值和临床症状，尤其是当类固醇直接注入 BC 时。
